the story and actors is good.
everyone is complaining about their initial reaction and how did survive/fight without eating or drinking anything.
Try to watch some "REAL" crime experiences and you will understand why or how. A girl was chopped her arms by a man and was thrown from bridge after being assaulted in forest but her will to survive helped her, she even managed to run and ask for help. Another experience, a group of men were trapped in a river (trapped in 3 or 4 days w/out eating, drinking or sleeping) a huge crocodile is waiting for them, they even saw how one of their friend was eaten by this creature and you know what they said, they cant cry because all they know is that they were afraid not knowing when the rescuer will find them.
what im trying to say is that, people can do unexplainable things just to survive.a